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