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