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