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