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