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