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