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