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