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