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