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