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