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