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)(17,18,23,26)(19,25,21,24)(20,29,31,22)(27,28,30,32)(3,4)(7,8)(11,15)(14,16)(17,19,23,21)(18,24,26,25)(20,30,31,27)(22,32,29,28)(1,3)(2,7)(4,6)(5,8)(9,10)(11,14)(12,13)(15,16)(17,20)(18,22)(19,27)(21,30)(23,31)(24,28)(25,32)(26,29) involution — undirected(3,4)(7,8)(17,21,23,19)(18,25,26,24)(20,30,31,27)(22,32,29,28)(1,4,6,3)(2,7,5,8)(9,11,12,15)(10,14,13,16)(17,22)(18,20)(19,28)(21,32)(23,29)(24,27)(25,30)(26,31)(1,5,6,2)(3,7,4,8)(9,10)(11,14)(12,13)(15,16)(17,18)(19,24)(20,22)(21,25)(23,26)(27,28)(29,31)(30,32)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.