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)(17,18,23,22)(19,24,27,32)(20,25,28,30)(21,29,31,26)(1,3,4,8)(2,5,6,7)(9,11,13,12)(10,14,15,16)(17,19,23,27)(18,24,22,32)(20,26,28,29)(21,30,31,25)(9,12,13,11)(10,14,15,16)(17,20)(18,25)(19,21)(22,30)(23,28)(24,29)(26,32)(27,31)(2,6)(5,7)(19,27)(21,31)(24,32)(26,29) involution — undirected(3,8)(5,7)(17,21,23,31)(18,26,22,29)(19,28,27,20)(24,25,32,30)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.