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