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