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