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