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