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