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