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