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