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