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