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