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