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