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