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