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