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