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