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