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