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