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