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