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