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