One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(9,10)(11,13)(12,14)(15,16)(17,18,21,25)(19,26,28,31)(20,23,29,24)(22,30,32,27)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(1,4,5,2)(3,7,8,6)(9,11)(10,13)(12,16)(14,15)(17,19,20,27,21,28,29,30)(18,22,24,26,25,32,23,31)(3,8)(6,7)(11,16)(13,15)(17,20,21,29)(18,23,25,24)(19,27,28,30)(22,31,32,26)(10,14)(13,15) 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.