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