One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,8)(5,14)(6,11)(7,12)(10,15)(13,16)(20,28)(24,29)(27,32)(30,31)(33,34)(35,40)(36,37)(38,41)(39,42)(43,47)(44,45)(46,48) involution — undirected(1,3,7,4)(2,8,12,9)(5,13,15,11)(6,10,16,14)(17,18,22,26)(19,21,25,23)(20,29,28,24)(27,31,32,30)(33,35)(34,40)(36,42)(37,39)(38,45)(41,44)(43,46)(47,48)(1,3,7,4)(2,9,12,8)(5,11,15,13)(6,10,16,14)(17,19)(18,23)(20,27)(21,26)(22,25)(24,31)(28,32)(29,30)(33,36)(34,35)(37,42)(38,44)(39,40)(41,43)(45,48)(46,47)(1,4,7,3)(2,9,12,8)(5,13,15,11)(6,10,16,14)(17,19)(18,21)(20,27)(22,25)(23,26)(24,30)(28,32)(29,31)(33,37,39,35)(34,36,42,40)(38,45,46,43)(41,44,48,47)(1,5,7,15)(2,10,12,14)(3,11,4,13)(6,9,16,8)(17,20)(18,24)(19,27)(21,30)(22,28)(23,31)(25,32)(26,29)(33,38)(34,41)(35,43)(36,44)(37,45)(39,46)(40,47)(42,48)(1,6,7,16)(2,11,12,13)(3,10,4,14)(5,9,15,8)(17,21)(18,25)(19,26)(20,30)(22,23)(24,32)(27,29)(28,31)(33,36)(34,37)(35,42)(38,44)(39,40)(41,45)(43,48)(46,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.