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