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