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