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