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