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