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