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