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