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