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