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