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