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