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