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