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