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