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