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