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