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)(11,16)(12,14)(13,15)(17,18,21,24)(19,26,28,23)(20,29,31,32)(22,27,30,25)(2,6)(7,8)(9,11,13,12)(10,14,15,16)(17,19,21,28)(18,23,24,26)(20,25,31,27)(22,29,30,32)(1,3,5,4)(2,7,6,8)(10,15)(11,12)(17,20,30,26,21,31,22,23)(18,19,27,32,24,28,25,29)(1,4,5,3)(2,8,6,7)(9,12,13,11)(10,14,15,16)(19,28)(20,31)(23,26)(29,32)(11,12)(14,16)(19,28)(20,31)(23,26)(29,32) 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.