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