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