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