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