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