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