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)(19,22)(20,27)(21,25)(23,26)(24,28)(29,31)(30,32) involution — undirected(1,3,6,5)(2,4,7,8)(9,10)(11,14)(12,13)(15,16)(17,19,24,21)(18,25,28,22)(20,30,23,29)(26,32,27,31)(2,7)(4,8)(9,11,12,15)(10,14,13,16)(17,20,24,23)(18,26,28,27)(19,29,21,30)(22,32,25,31)(1,4,6,8)(2,3,7,5)(17,21,24,19)(18,25,28,22)(20,29,23,30)(26,32,27,31)(1,5,6,3)(2,8,7,4)(17,22,24,25)(18,19,28,21)(20,31,23,32)(26,30,27,29)(17,23,24,20)(18,27,28,26)(19,29,21,30)(22,32,25,31)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.