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