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