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