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