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