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