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)(11,15)(12,13)(14,16)(17,18,24,29)(19,25,32,42)(20,33,36,45)(21,39,31,41)(22,28,23,27)(26,38,44,37)(30,43,46,48)(34,40,35,47)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,24,32)(18,25,29,42)(20,34,36,35)(21,23,31,22)(26,43,44,48)(27,41,28,39)(30,38,46,37)(33,40,45,47)(1,3,4,7)(2,6,5,8)(10,13)(14,15)(17,20,22,37,24,36,23,38)(18,26,27,33,29,44,28,45)(19,30,31,34,32,46,21,35)(25,40,39,43,42,47,41,48)(9,11,12,16)(10,14,13,15)(17,21,23,32,24,31,22,19)(18,25,28,41,29,42,27,39)(20,35,38,46,36,34,37,30)(26,40,45,48,44,47,33,43)(2,5)(6,8)(20,36)(26,44)(30,46)(33,45)(34,35)(37,38)(40,47)(43,48) involution — undirectedA 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.