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