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