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