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