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