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