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