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