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