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