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