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