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