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