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