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