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