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