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