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