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