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