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