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