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)(17,18,21,23)(19,27,28,42)(20,25,31,38)(22,35,34,26)(24,36,37,30)(29,43,32,46)(33,48,45,41)(39,47,40,44)(1,2)(3,8)(4,6)(5,7)(9,11)(10,14)(12,16)(13,15)(18,23)(19,28)(20,31)(26,35)(30,36)(33,45)(39,40)(43,46) involution — undirected(10,12)(11,15)(17,19,21,28)(18,24,23,37)(20,32,31,29)(22,36,34,30)(25,40,38,39)(26,42,35,27)(33,44,45,47)(41,43,48,46)(1,3,5,4)(2,6,7,8)(9,12,13,10)(11,14,15,16)(17,20)(18,25)(19,29)(21,31)(22,33)(23,38)(24,39)(26,41)(27,43)(28,32)(30,44)(34,45)(35,48)(36,47)(37,40)(42,46)(1,4,5,3)(2,6,7,8)(11,15)(14,16)(18,23)(20,31)(24,37)(26,35)(27,42)(29,32)(33,45)(44,47)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.