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