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