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