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