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