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