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