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