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