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