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