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