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