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