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