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