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