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