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)(17,18,20,23)(19,27,29,41)(21,34,32,47)(22,35,33,26)(24,38,36,30)(25,40,37,28)(31,46,45,43)(39,44,42,48)(1,3,4,11,5,10,13,14)(2,6,7,9,8,15,12,16)(18,23)(24,36)(25,37)(26,35)(27,41)(34,47)(39,42)(43,46)(17,19,28,44,22,31,32,38,20,29,40,48,33,45,21,30)(18,24,34,43,26,39,37,41,23,36,47,46,35,42,25,27)(3,10)(6,15)(9,16)(11,14) 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.