One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,11)(3,9,13,16)(4,14,12,8)(5,10,6,15)(17,18,22,26)(19,27,29,41)(20,24,31,38)(21,33,34,25)(23,35,37,30)(28,40,42,48)(32,45,44,39)(36,46,47,43)(1,3,6,12,7,13,5,4)(2,8,10,9,11,14,15,16)(17,19,21,30,22,29,34,35)(18,23,25,27,26,37,33,41)(20,28,32,43,31,42,44,46)(24,36,39,40,38,47,45,48)(1,4,5,13,7,12,6,3)(2,9,15,8,11,16,10,14)(17,20,22,31)(18,24,26,38)(19,28,29,42)(21,32,34,44)(23,36,37,47)(25,39,33,45)(27,40,41,48)(30,43,35,46)(19,29)(23,37)(27,41)(28,42)(30,35)(36,47)(40,48)(43,46) involution — undirected(1,5,7,6)(2,10,11,15)(3,12,13,4)(8,16,14,9)(19,29)(20,31)(23,37)(24,38)(27,41)(30,35)(32,44)(39,45)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.