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