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