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