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