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