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