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