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