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