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