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