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