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