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