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