One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,13)(5,10)(6,14)(7,9)(11,16)(12,15)(17,18)(19,27)(20,25)(21,31)(22,24)(23,28)(26,29)(30,32)(34,39)(35,42)(37,45)(44,47) involution — undirected(1,3,7,4)(2,8,9,13)(5,14,15,11)(6,12,16,10)(17,19,22,28)(18,23,24,27)(20,29,30,21)(25,31,32,26)(33,34,38,39)(35,36,42,40)(37,41,45,46)(43,44,48,47)(2,9)(3,4)(10,12)(11,14)(18,24)(23,27)(25,32)(26,31)(33,35,38,42)(34,40,39,36)(37,43,45,48)(41,47,46,44)(1,4,7,3)(2,8,9,13)(5,14,15,11)(6,10,16,12)(17,18)(19,23)(20,25)(21,26)(22,24)(27,28)(29,31)(30,32)(33,35)(34,36)(37,43)(38,42)(39,40)(41,44)(45,48)(46,47)(1,5,7,15)(2,10,9,12)(3,11,4,14)(6,8,16,13)(17,20,22,30)(18,25,24,32)(19,21,28,29)(23,26,27,31)(33,36)(34,35)(37,44)(38,40)(39,42)(41,43)(45,47)(46,48)(1,6,7,16)(2,11,9,14)(3,12,4,10)(5,13,15,8)(17,21)(18,26)(19,20)(22,29)(23,25)(24,31)(27,32)(28,30)(33,37)(34,41)(35,43)(36,44)(38,45)(39,46)(40,47)(42,48)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.