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