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