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