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