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