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