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