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