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