One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6,11,14,10,15,9,16)(7,17,18,20,8,12,19,13)(21,22,24,28,25,30,26,29)(23,31,32,36,34,27,33,35)(1,2,4,3)(5,7,10,8)(6,12,15,17)(9,19,11,18)(13,16,20,14)(21,23)(22,27)(24,32)(25,34)(26,33)(28,35)(29,36)(30,31)(5,8,10,7)(6,13,15,20)(9,19,11,18)(12,16,17,14)(22,28)(23,32)(24,26)(27,31)(29,30)(33,34)(1,3,4,2)(5,9,10,11)(6,14,15,16)(7,18,8,19)(12,20,17,13)(21,24,25,26)(22,29,30,28)(23,33,34,32)(27,35,31,36)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.