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