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