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