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